第26回応用力学シンポジウム

Presentation information

Regular Session

General Session (2.Computational Mechanics)

2.Computational Mechanics

Sat. May 27, 2023 10:10 AM - 11:40 AM B (6号館 4階 6418室)

座長:西藤 潤(京都大学)

11:10 AM - 11:25 AM

[12007-12-05] Topology Optimization for Maximization of Nonlinear Buckling Load Factor with Stress and Stiffness Constraints (Proceedings of Symposium on Applied Mechanics)

*Keisuke Imoto1, Hiroya Hoshiba1, Koji Nishiguchi1, Hisao Uozumi2, Junji Kato1 (1. Nagoya University, 2. Honda R&D)

Keywords:Topology Optimization, Buckling, Stress Constraint, Nonlinear

Previous study has proposed an optimization method to improve structual strength by computing a problem to maximize a nonlinear buckling load factor with stiffness constraint. However, when relatively hard materials such as metals are used, the optimal structure with a certain buckling strength is subject to strength reduction due to local elasto-plastic deformation prior to buckling, therefore the theme is how to account for material nonlinearity as well as nonlinear buckling. In this study, a topology optimization method was developed to simultaneously control the maximum values of stiffness, buckling load, and stress by adding stress constraint that take geometric nonlinearity into account to the optimization problem of previous study, with the aim of avoiding material yielding.